26305040 has 20 divisors (see below), whose sum is σ = 61159404. Its totient is φ = 10521984.

The previous prime is 26305033. The next prime is 26305061. The reversal of 26305040 is 4050362.

It can be written as a sum of positive squares in 2 ways, for example, as 20214016 + 6091024 = 4496^2 + 2468^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164327 + ... + 164486.

Almost surely, 2^26305040 is an apocalyptic number.

26305040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26305040 is an abundant number, since it is smaller than the sum of its proper divisors (34854364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26305040 is a wasteful number, since it uses less digits than its factorization.

26305040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328826 (or 328820 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 26305040 is about 5128.8439243167. The cubic root of 26305040 is about 297.4036691150.

The spelling of 26305040 in words is "twenty-six million, three hundred five thousand, forty".